초록

Weir is installed across a river with the general purpose of controlling water level and water intake. Most weirs installed on rivers are fixed weirs and hinder water flow to bring about sedimentation of earth and sand and deterioration of water quality causing destruction of the river environment. Due to such reason, movable weir which can control reservoir capacity has been developed recently and increasingly installed instead of existing fixed weir and various studies have been carried out to develop methods for self-purification effect and reducing sedimentation of earth and sand.&lt;br&gt;From movable weir, rubber dams have been used in many construction sites due to ease of maintenance administration but if the rubber sheet is damaged artificially or by natural disaster, harm is done to the river and high maintenance and repair costs are incurred if neglected for a long time. Also, the life expectancy of a rubber dam is over 30 years so appropriate management and maintenance administration are required to secure safety of the river and proper water procurement.&lt;br&gt;This study developed rubber sheet for improvement of maintenance and repair for rubber dam which is repaired most often for purpose of irrigation and water intake in rivers and such results are as follows.&lt;br&gt;As a result of investigating repair cases when operating rubber dams, repair cases for poor assembly of rubber panel was only about 3.5% of all cases while there were no reported cases of self-defect of rubber dams. From a total of 19 cases of rubber dam repairs, 12 cases (63.2%) were due to external conditions so it is determined that rubber sheet development is needed for improving the durability and safety of rubber dams. Regarding such finding, this study developed a rubber dam enabling bullet resistance/cut resistance by adding aramid sheet when producing rubber sheet and enabled abrasion check by coating the outer layer with colored synthetic rubber.&lt;br&gt;As a result of developing rubber sheet for improving maintenance and repair of rubber dams, durability and safety were found to be better than existing rubber dam while there were effects of ease of maintenance administration and greater economic efficiency as well. For continuous and permanent use of rubber dams, it is determined that systematic research and continuous development are necessary.